Stop mechanism for automatic typewriter-operating mechanism



. J. H. PILLINGS. STOP MECHANISM FOR AUTOMATICTYPE-WRITER OPERATING MECHANISM.

APPLICATION FILED JULY 14. I919.

Patented Nov. 2, 1920.

2 SHEETSSHEET 1.

J. H. PILLINGS.

STOP MECHANISM FOR AUTOMATIC TYPEWRITER OPERATING MECHANISM.

APPLICATION FILED JULYH, 1919.

1,357,51 5. Patented Nov. 2, 1920.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

JOHN H. PILLIN'GS, OF HAMILTON, OHIO, ASSIGNOR TO HOOVEN AUTOMATIC TYPE- WRITER CORPORATION, OF HAMILTON, OHIO, A CORPORATION OF NEW YORK.

STOIP 'J'MECHANIS'M FOR AUTOMATIC TYPEWRITER-OPERATIN G MECHANISM.

Specification of Letters Patent.

Patented Nov. 2, 1920.

Application filed July 14, 1919. Serial N0. 310,693.

useful Improvement in Stop Mechanism for Automatic Typewriter-Operating Mechanism, of which the following is a full, clear, and exact description.

This invention is intended for use as a part of the kind of typewriter operating mechanism in which a perforated controller strip determines the sequence in which the key levers and other parts of the typewriter are selectively operated.

The present invention felates to the means by which power is transmitted to a cylinder which, among other things, causes the advancing movement of the perforated controller strip. It relates also to certain clutch mechanism which is a part of that power transmitting mechanism. It also relates to the means by which this clutch mechanism is rendered inoperative whenever a stop perforation in the controller strip reachesthe functioning position and thereby causes the automatic operation of certain mechanism. It also relates to the means by which this clutch is retained in the inoperative position after it has been moved to that position. It also relates to the means by which the clutch may be again allowed tofunction whenever desired. It also relates to the means by which when the clutch is released so as to sever the driving connection with that cylin der which moves the perforated controller Stripfall other moving parts of the mechanism will cease to operate. i

The invention consists in the construction and combination of parts shown in the same as is, necessary to disclose the present invention; Fig. 2 is a front elevation, partly sectioned,of the left side of the typewriter operating mechanism,-particularly the part thereof which involves the invention. Fig. 3 is a vertical section on line 3+3 on Fig. 2, and Fig. 4 is-a vertical section on line 4-4 on Fig. 2.

As'shown in the drawing, the perforated controller strip S runs over a rotatable cylinder 10, which cylinder is equipped with spurs 11 that engage perforations adjacent the margin of the strip, whereby the strip will be moved along in unison with the cylinder.

Associated with thecylinder and controller strip are certain mechanisms for operatlng Various parts of a typewriter, said parts being so constructed that each will be automatically operated and will perform the function for which it is provided whenever an associated hole in the controller strip 'comes into functioning position. This cylinder is secured upon a shaft 12 which is rotata-bly mounted. A worm wheel 20 is rotatably mounted upon this shaft near its left end, and is in constant mesh with a worm 30 earned by a rotatable shaft 31 to which rotary motion is imparted from an electric motor 40 through suitable transmission mechanism, as for example, a belt'41.

A clutch device is provided for connecting the shaft 12 with the worm wheel 20 thereon. inder will be rotated, thereby advancing the controller strip to bring the several perforations therein into functioning positions, whereby, through mechanism which is characteristic of machinery of this kind, the various parts of the typewriterv are operated in proper sequence and in timed relation.

In the end of the shaft 12 is a diametrical slot 13 in which a clutch block 15 is slidably.

mounted. Stems 16 and 17 project in opposite directions from this clutch block.

The stem 17 is slidably mounted in an axial hole 12 in the shaft. Thestem 16 is slidably supported in a hole in the end of a cup 18,

which is fixed to the end of the shaft. On

this clutch block is a tooth 19 which projects radially out beyond the shaft, as shown in the drawing. A spring 15 in the hole 12" engages the stem 17 and acts to force said stem and the clutch block and its tooth to-,,

fitted endof this collar are radial slots 22 (oneOr, mOre) into which the tooth 19 may projectl Between this'slotted end of this collar and the worm wheel 20, the collar contains an internal annular recess 23, within which the tooth 19 may be retracted by the 11 When these are connected the cyl- 80 inward movement of the clutch block. When the tooth is in this recess it is out of the slot 21, and no longer connects the worm wheel to the shaft.

In order to automatically move the clutch block to, this unclutching position, a pivoted bell crank rocker 50 is provided. One vertical arm 51 of this rocker engages the projecting end of the stem 16 of the clutch block. The other arm 52 is horizontal and extends to a position such that it may be engaged and moved by a mechanism provided for the purpose whenever the stop perforation in the controller strip comes to the functioning position.

The mechanism shown for this purpose consists of a vertically movable hanger 60, to which a pawl 61 is pivoted, said pawl extending forward over and resting upon the controller strip S. perforation in that strip moves beneath the point of the pawl, said pawl will drop through the perforation and into a pocket or groove in the cylinder 10. Thereupon the cylinder will push the pawl endwise rearwardly; and of course, the hanger will be similarly displaced. On the rear side of the hanger is a shoulder 62 which, by said rearward displacement, will be carried into the path of a vertically reciprocating depressor-bar 63 which by engaging said shoulder will move the hanger down. In its downward movement the lower end of the hanger will strike the arm 52, and will rock the rocker, whereby the arm 51 will push the clutch pawl to the inoperative position described. The particular automatic mechanism shown, as above described, for so rocking the rocker when a stop perforation in the controller strip reaches the functioning position, is not essential to this invention. Any equivalent mechanism may be employed to produce this result, as for example, the mechanism shown in my prior Patent No. 1,200,979. But whatever may be the specific form of this automatic mechanism it will return toits normal position as soon as it has rocked the rocker as stated. It is necessary, therefore, to provide latch mechanism which will actautomatically to hold the rocker in the clutch releasing position, when it has been moved into that position.

To effect. that result a control lever 70 is pivoted to a fixture adjacent the arm 52,

Near its lower end this control lever has a shoulder 72. When the rocker arm is moved down as stated the pin 53 will pass below the shoulder 72 whereupon the spring 71 will rock the control lever so as to carry When the stop the shoulder over the pin, whereby the upward movement of the rocker will be prevented. The clutch block 15 will therefore remain in the unclutched position as shown in Fig. 2 until an attendant rocks the con- .trol lever 70 into the other position.

If, however, there were nothing more, the shaft 31 would continue to rotate; and all of the parts which this shaft operates would continue to move uselessly so long as the cylinder 10 remained disconnected from the shaft 12. To prevent this, means are provided for stopping the motor as the cylinder is unclutched from the driving worm wheel. The motor is' an electric motor. The, flow of current to the motor is controlled by an ordinary two button electric switch. The two switch buttons 35, 36, are placed side by side. A pivoted rocker 37 overlies them; so that as it is rocked it may push down one or the other. This rocker carries a centrally placed upwardly extended arm 38 on which is a laterally extended pin 39. This goes into a slot 74: in-the lower end of the control lever 70.

'As said lever moves to the position where it latches down the rocker arm 52 it also rocks the rocker 87 which in turn pushes down the switch button 36, whereby the current is cut off from the motor. -When '95 'the control lever is moved in the opposite fluence of its spring 12 into the clutching position in which it again connects the worm wheel 20 with the shaft 12. As the control lever 70 moves to this position it again rocks the rocker 37 so that the push button 35 is depressed, thereby'again connecting the motor with the current supply.

Various changes may be made in the specific embodiment of the invention shown and described herein, provided the means stated in any ofthe following claims or the equivalents of such stated means be employed.

Having described my invention, 1 claim 1. In typewriter operating mechanism, the

combination of a shaft which forms a part of said mechanism, a driving shaft, mecha- 1 nism including a clutch for making andbreaking the operative connection between said two shafts, means to automatically move said clutch mechanism into the clutch- "ing position, clutch operating mechanis'm'125 adapted to be selectively operated by the typewriter operating mechanism for moving said clutch into the inoperative position, and a-latch which acts automatically to 'hold the clutch operating mechanism in the clutch released position after it has been moved to that position.

2. In typewriter operating mechanism, the combination of a shaft which forms a part of said mechanism, a driving shaft, mecha nism including a clutch for making and breaking the operative connection between said two shafts, means to automatically move said clutch mechanism into the clutching position, clutch operating mechanism adapted to be selectively operated by the typewriter operating mechanism for moving said clutch into the inoperative position, and a latch which acts automatically to hold the clutch operating mechanism in the clutch released position after it has been moved to that position, an electric motor for driving said driving shaft, an electric switch controlling the flow of current to said motor, and means operated by said latch for throwing said switch.

3. In typewriter operating mechanism which is organized to be controlled by a perforated controller strip, the combination of a rotatable shaft, a worm wheel loosely mounted thereon, a driving shaft carrying a worm which engages with said worm wheel,'an electric motor for actuating said driving shaft, a clutch which acts automatically to connect said worm wheel with the shaft on which it is mounted, clutch operating mechanism adapted to be selectively operated by a part of the automatic typewriter operating mechanism for moving said clutch into the releasing position. and an automaticlatch engaging a part of said clutch operating mechanism and preventing its return movement. a

.45. In typewriter operating mechanism which is organized to be controlled by a perforated controller strip, the combination of a rotatable shaft, a worm wheel loosely mounted thereon, a driving shaft carrying a worm which engages with said worm wheel, an electric motor for actuating said driving shaft, a clutch which acts automatically to connect said worm wheel with the shaft on which it is mounted, clutch operatingmechanism adapted to be selectively operated by a part .of the automatic typewriter operating mechanism for moving said clutch into the releasing position, and an automatic latch engaging a part of said clutch operating mechanism and preventing its return movement, an electric switch for said motor, and means operated by said latch as it moves to the latching position for operating said switch to shut off current from said motor.

5. In mechanism for automatically operating typewriters, the combination of a rotatable shaft which forms a part of said mechanism, a worm wheel loosely mounted thereon, a driving shaft, a worm thereon engaging said worm wheel, a clutch device carried by said shaft, means to cause its automatic movement into engagement with said worm wheel to connect the same with said shaft, a clutch operating stem projecting out of the end of said shaft, a rocker having an arm adapted to engage the projecting stem of said clutch mechanism and having a horizontal arm, means for selectively moving said horizontal arm downward, and a latch which acts automatically when said arm is moved downward to hold it down.

6. In mechanism for automatically operating typewriters, the combination of a rotatable shaft which forms a part of said mechanism, a worm wheel loosely mounted thereon, a driving shaft, a worm thereon engaging said worm wheel, a clutch devicecarried by said shaft, means to cause its automatic movement into engagement with said worm wheel to connect the same with said shaft, a clutch operating stem projecting out of the end of said shaft, a rocker having an arm adapted to engage the projecting stem of said clutch mechanism and having a horizontal arm, means for selectively moving said horizontal arm downward, and a latch which acts automatically when said arm is moved downward to hold it down, an electrio motor for operating said driving shaft,

an electric switch for controlling the flow of current to said motor, and means actuated by said latch to throw said switch,-said means acting to shut off the current of the motor when the latch movesin the latching position, and to connect the current with the motor when the latch is moved to the un latched position.

In typewriter operating mechanism, a rotatable shaft which forms a part of said mechanism, a worm wheel loosely mounted thereon, a driving shaft, a worm carried thereby for engagement with said worm Wheel said shaft containing a diametrical slot, a clutch block mounted to slide endwise in said slot and provided with an outwardly projecting clutch finger, a part rigidly fixed to said worm wheel having an internal circumferential recess into which said clutch finger may retreat and having a radial slot into which said clutch finger may project, a spring for moving said clutch block to cause its finger to engage in said wardly projecting c utch finger a partrigidly fixed to said worm wheel having an internal circumferentlal recess in which said clutch finger may retreat and having a radial slot into which said clutch finger may project, a spring for moving said clutch block to cause its finger to engage in said slot, said clutch block having a stem which projects out from the end of said shaft, a rocker having an arm for engaging said projecting stemand having also a horizontal slot, a clutch block mounted to slide endwise in said slot and provided with an outwardly projecting clutch finger, a part rigidly fixed to said worm wheel having an internal 'circumferential recess in which said clutch finger may retreat and. having a radial slot into which said clutch finger may project, a spring for moving said clutch block to cause its finger to engage in said slot, said clutch block having a stem which projects out from the end of said shaft, a rocker having an arm for engaging said projecting stem and having also a horizontal arm, means adapted to be selectively operated by the typewriter operating mechanism. for moving said horizontal arm downward, an automatic latch to engage said arm and hold it, a spring for moving said horizontal arm upward.

10. In typewriter operating mechanism, the combination of ashaft which forms a part of said mechanism, a driving shaft, mechanism including a clutch for making and breaking the operative connection between said two shafts, means to automatically move said clutch mechanism into the clutching position, means adapted to be selectively operated by the typewriter operating mechanism for moving said clutch to the inoperative position, anelectric motor for driving said driving shaft, a two button switch to control the flow of current to said motor, a rocker pivoted in operative relation to the two buttons of said switch, a latch which acts automatically to hold the clutch releasing mechanism'in the clutch released position after it has been moved to that position, and means operated by said latch for rocking the switch actuating rocker.

11. In typewriter operating mechanism,

the combination of a shaft which forms a has been moved downward.

12. In typewriter operating mechanism, the combination of a shaft which forms a part of said mechanism, a driving shaft, mechanism including a clutch for making and breaking the operative connection between said two shafts, a spring for moving said clutch mechanism into the clutching position, a rocker for moving said clutch mechanism into the clutch releasing position which rocker includes a horizontal arm, a stud secured to said arm, a pivoted latch lever having a shoulder adapted to engage said stud, and a spring for nroving said latch lever to cause its shoulder to pass over and engage said stud when said horizontal arm has been moved downward, an electric motor for driving said driving shaft, an electric switch to control the flow of current to said motor, a rocker for ope ating said switch which rocker has an upwardly extended arm provided with a laterally extended pin, and said latch having a vertical slot into which said pin projects. I

In testimony whereof, I hereunto affix my signature.

JQHN H. PILLINGS. 

